code: def tearDown(self):
      self.kill_pub.send(cellprofiler_core.worker.NOTIFY_STOP)
      self.server.join()
      self.kill_pub.close()
      self.socket.close()
  
file_path: CellProfiler/tests/frontend/test_knime_bridge.py
imports: import pytest
  import unittest
  import uuid
  import zmq
  import cellprofiler.knime_bridge
  import cellprofiler.modules.flagimage
  import cellprofiler.modules.identifyprimaryobjects
  import cellprofiler.modules.measureobjectsizeshape
  import cellprofiler.modules.saveimages
  import cellprofiler.modules.threshold
  import cellprofiler_core.worker
label_desc: Use image node_id 2 for calling the TestKnimeBridge obj's underlying member method code with example usage: obj.tearDown() without return types